Singirik, E., Calişkan, U., Cenik, A. G., & Doğan, N. (1989). Effects of verapamil, papaverine, sodium nitrite, and hydralazine on ethyl alcohol-induced contraction of the isolated human umbilical artery. The Turkish Journal of Pediatrics, 31(2), 145-149. https://turkjpediatr.org/article/view/3838